CV-18 Fujian/003 CATOBAR carrier thread

[valysre]

Out of curiosity, will Fujian's engines ever stop running so black, or is this just a feature of large diesel engines?

 

[gelgoog]

It does not use diesel engines for main propulsion. It uses steam turbines and boilers. While I think they do use diesel as fuel, the boilers can run on pretty much anything that burns. Just dump it into the furnace. The Soviets used 'mazut' which is heavy fuel oil.

 

[taxiya]

Out of curiosity, will Fujian's engines ever stop running so black, or is this just a feature of large diesel engines?

Same question can be asked about QEII, original photo is here

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The answer is easy to be found by googling "Queen Elizabeth carrier smoke".

 

[Yazzinra]

Out of curiosity, will Fujian's engines ever stop running so black, or is this just a feature of large diesel engines?

Short answer: no.

Longer answer: Black "smoke" is just unburnt fuel. It's typically generated from one of 4 sources: vehicle startup, rapid acceleration, aftermarket products meants to induce it or, engine malfunction (major or minor.) It's not an issue outside of an engine problem and most diesel vehicles do it from time to time.

My guess, most of the images of her belching black smoke is from engine startup in port. Its normal, nothing to note. Its more photogenic is all.

Note: knowledge based on Semi engines, not marine engines.

 

[lcloo]

Black smoke is normal during cold start of a ship's engine due to imcomplete burn of rich fuel mixture. Once the engine is heated up to high temperature, the black smoke should cease.

This is normal for a ship still under sea trials. From the photos, Fujian's no so smoky exhaust is actually quite good for a new ship that has done only 2 sea trials.

 

[kwaigonegin]

They are indeed just push bumpers, or at least that seems to be their primary purpose. Here are a pair of screen grabs from the first sea trial video showing this.

They are called stern docks. Yes they do double as a rear ' bumper' however their primary function is for docking of smaller crafts.
Some ports may not have facilities for an acom ladder so egress and ingress can be done via the rear to a smaller ship tied behind.
There is a door behind the H frames. That's how you get in and out.
You can reference from my picture below.

 

[by78]

The PLANS-18 "Fujian's" engines are running again ... maybe preparing for a third trial?
Also interesting are the J-15 and KJ-600 mock-ups on deck.

(Images via @北冥有鱼MK6 from Weibo)


Upps ... they are all too big to be uploaded here:

https://twitter.com/i/web/status/1806354133848309843

High-resolution versions.

 

[by78]

One more.

 

[venturer]

They are called stern docks. Yes they do double as a rear ' bumper' however their primary function is for docking of smaller crafts.
Some ports may not have facilities for an acom ladder so egress and ingress can be done via the rear to a smaller ship tied behind.
There is a door behind the H frames. That's how you get in and out.
You can reference from my picture below.

You may very well be right, they could also be intended for docking small crafts at the stern. However, in the case of the Fujian, they are affixed to the stern with a large number of thin struts, making it unlikely to have an accessible door behind it like the Nimitz. Passengers from small crafts docked at the stern would have to board / alight via the fantail opening using accommodation ladders or stowaway gangway, but that could be done without such an elaborate structure. So, I still believe their primary purpose is simply as push bumpers or, if the number of struts is an indication, for towing as well.

 

[Index]

Out of curiosity, will Fujian's engines ever stop running so black, or is this just a feature of large diesel engines?

From starting up the engines